Arch Linux

loqs

Member

Registered: 2014-03-06

Posts: 17,450

Re: [SOLVED] Xorg not starting after system update

If you revert the bad commit

cd linux-drm-tip-git/src/drm-tip
git revert -n d179b88deb3bf6fed4991a31fd6f0f2cad21fab5 #this was the commit that was backported to stable
cd ../..
makepkg -ersi #you could increment the pkgrel if you wanted to keep the built failing one as pkgrel=1 and the probably working as pkgrel=2

see if that also fixes the issue on drm-tip would append dmesg from the good and bad after startx has been run with the boot options drm.debug=0x1e log_buf_len=1M without the boot option nomodeset
https://01.org/linuxgraphics/documentat … eport-bugs

Last edited by loqs (2019-03-07 21:52:50)

liara

Member

Registered: 2013-04-10

Posts: 32

Re: [SOLVED] Xorg not starting after system update

@loqs Indeed, reverting the commit still works with drm-tip. Posted the good and the bad logs upstream, hope it helps. Had some issues compiling the drm-tip  kernel with the reverted commit, if failed in depmod, because of nonexistent extramodules: No such file or directory. I guess because of -r? So i did the revert after starting makepkg, it somehow worked it looks. But what would have been the right approach though? Anyway, I hope they figure out what's wrong and fix it.

Last edited by liara (2019-03-09 21:16:21)

loqs

Member

Registered: 2014-03-06

Posts: 17,450

Re: [SOLVED] Xorg not starting after system update

The kernel detected the git repository had uncommitted changes so adds the suffix '-dirty' to the output of `make kernelrelease` which causes the problem with the path for extramodules.

git config --local user.name "John Doe"
git config --local user.email johndoe@example.com
git revert d179b88deb3bf6fed4991a31fd6f0f2cad21fab5 #accept the default commit message

Edit:
Alternatively you can use `scripts/setlocalversion --save-scmversion` before modifying the repository if you want the version to be updated again later remove the file .scmversion

Last edited by loqs (2019-03-09 22:13:04)

liara

Member

Registered: 2013-04-10

Posts: 32

Re: [SOLVED] Xorg not starting after system update

Ah, I see. Indeed it had a dirty suffix. I checked there and there were no extramodules in it. Thank you for the explanation.

Last edited by liara (2019-03-09 22:59:59)

loqs

Member

Registered: 2014-03-06

Posts: 17,450

Re: [SOLVED] Xorg not starting after system update

Not a bug in the kernel, xorg's modesetting driver needs to set all connectors/crtc's directly when using atomic. The legacy path disabled crtc B for you if you stole all its connectors for a different crtc. In the atomic case you need to disable it yourself.

This is a bug in x.org's modesetting driver.

You could try asking for help on IRC or xorg mailing list or submit an issue to https://gitlab.freedesktop.org/xorg/xserver/issues

liara

Member

Registered: 2013-04-10

Posts: 32

Re: [SOLVED] Xorg not starting after system update

It looks like it has been reported there https://gitlab.freedesktop.org/xorg/xserver/issues/542, not much activity though. Will post there later.

piratebill

Member

From: Sol System

Registered: 2011-10-20

Posts: 133

Re: [SOLVED] Xorg not starting after system update

It doesn't look like this bug is getting patched anytime soon. According to this post: https://gitlab.freedesktop.org/xorg/xse … ote_137355 Fedora has patched their own kernel to fix this. The question is, can we do the same in Arch? Who would we need to contact to do that?

Lone_Wolf

Forum Moderator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,966

Re: [SOLVED] Xorg not starting after system update

Create a bug report in archlinux bugtracker .

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

AndrewK

Member

From: Burnaby, Canada

Registered: 2015-12-18

Posts: 10

Re: [SOLVED] Xorg not starting after system update

I also had the "modeset(0): failed to set mode: Invalid argument" error and temporary worked around it by disabling the modesetting driver for Xorg so I didn't have to downgrade.
So I am now using the intel driver again. Hopefully it will be fixed in the next kernel update

@robin67 I made a stab at your approach but seem to have hit a dead end.  I added nomodeset and i915.modeset=0 to the kernel command line (in grub) but only succeeded in making screen 0 unrecognized.

Could you explain more fully what you did?

---

Clever.  Too clever.

anvil

Member

Registered: 2019-02-02

Posts: 10

Re: [SOLVED] Xorg not starting after system update

The current kernel version (5.0.11-arch1-1-ARCH) fixes the issue for me. Thanks everyone for your help!